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Finding the Fourth Proportional to 445,449.70, 668,174.52 and 129,906.58

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Solution

The fourth proportional to 445,449.70, 668,174.52 and 129,906.58 is: 194,859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,449.70 : 668,174.52 = 129,906.58 : x
  2. Step 2: Convert to fraction form
    445,449.70/668,174.52 = 129,906.58/x
  3. Step 3: Cross multiply
    445,449.70x = 668,174.52 × 129,906.58
  4. Step 4: Simplify right side
    445,449.70x = 86,800,266,736.34
  5. Step 5: Solve for x
    x = 86,800,266,736.34/445,449.70
  6. Step 6: Final answer
    x = 194,859.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.